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Identification of Novel Quantitative Trait Loci Linked to Crown Rot Resistance in Spring Wheat
Crown rot (CR), caused by various Fusarium species, is a major disease in many cereal-growing regions worldwide. Fusarium culmorum is one of the most important species, which can cause significant yield losses in wheat. A set of 126 advanced International Maize and Wheat Improvement Center (CIMMYT)...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6165080/ https://www.ncbi.nlm.nih.gov/pubmed/30205560 http://dx.doi.org/10.3390/ijms19092666 |
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author | Erginbas-Orakci, Gul Sehgal, Deepmala Sohail, Quahir Ogbonnaya, Francis Dreisigacker, Susanne Pariyar, Shree R. Dababat, Abdelfattah A. |
author_facet | Erginbas-Orakci, Gul Sehgal, Deepmala Sohail, Quahir Ogbonnaya, Francis Dreisigacker, Susanne Pariyar, Shree R. Dababat, Abdelfattah A. |
author_sort | Erginbas-Orakci, Gul |
collection | PubMed |
description | Crown rot (CR), caused by various Fusarium species, is a major disease in many cereal-growing regions worldwide. Fusarium culmorum is one of the most important species, which can cause significant yield losses in wheat. A set of 126 advanced International Maize and Wheat Improvement Center (CIMMYT) spring bread wheat lines were phenotyped against CR for field crown, greenhouse crown and stem, and growth room crown resistance scores. Of these, 107 lines were genotyped using Diversity Array Technology (DArT) markers to identify quantitative trait loci linked to CR resistance by genome-wide association study. Results of the population structure analysis grouped the accessions into three sub-groups. Genome wide linkage disequilibrium was large and declined on average within 20 cM (centi-Morgan) in the panel. General linear model (GLM), mixed linear model (MLM), and naïve models were tested for each CR score and the best model was selected based on quarantine-quarantine plots. Three marker-trait associations (MTAs) were identified linked to CR resistance; two of these on chromosome 3B were associated with field crown scores, each explaining 11.4% of the phenotypic variation and the third MTA on chromosome 2D was associated with greenhouse stem score and explained 11.6% of the phenotypic variation. Together, these newly identified loci provide opportunity for wheat breeders to exploit in enhancing CR resistance via marker-assisted selection or deployment in genomic selection in wheat breeding programs. |
format | Online Article Text |
id | pubmed-6165080 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-61650802018-10-10 Identification of Novel Quantitative Trait Loci Linked to Crown Rot Resistance in Spring Wheat Erginbas-Orakci, Gul Sehgal, Deepmala Sohail, Quahir Ogbonnaya, Francis Dreisigacker, Susanne Pariyar, Shree R. Dababat, Abdelfattah A. Int J Mol Sci Article Crown rot (CR), caused by various Fusarium species, is a major disease in many cereal-growing regions worldwide. Fusarium culmorum is one of the most important species, which can cause significant yield losses in wheat. A set of 126 advanced International Maize and Wheat Improvement Center (CIMMYT) spring bread wheat lines were phenotyped against CR for field crown, greenhouse crown and stem, and growth room crown resistance scores. Of these, 107 lines were genotyped using Diversity Array Technology (DArT) markers to identify quantitative trait loci linked to CR resistance by genome-wide association study. Results of the population structure analysis grouped the accessions into three sub-groups. Genome wide linkage disequilibrium was large and declined on average within 20 cM (centi-Morgan) in the panel. General linear model (GLM), mixed linear model (MLM), and naïve models were tested for each CR score and the best model was selected based on quarantine-quarantine plots. Three marker-trait associations (MTAs) were identified linked to CR resistance; two of these on chromosome 3B were associated with field crown scores, each explaining 11.4% of the phenotypic variation and the third MTA on chromosome 2D was associated with greenhouse stem score and explained 11.6% of the phenotypic variation. Together, these newly identified loci provide opportunity for wheat breeders to exploit in enhancing CR resistance via marker-assisted selection or deployment in genomic selection in wheat breeding programs. MDPI 2018-09-08 /pmc/articles/PMC6165080/ /pubmed/30205560 http://dx.doi.org/10.3390/ijms19092666 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Erginbas-Orakci, Gul Sehgal, Deepmala Sohail, Quahir Ogbonnaya, Francis Dreisigacker, Susanne Pariyar, Shree R. Dababat, Abdelfattah A. Identification of Novel Quantitative Trait Loci Linked to Crown Rot Resistance in Spring Wheat |
title | Identification of Novel Quantitative Trait Loci Linked to Crown Rot Resistance in Spring Wheat |
title_full | Identification of Novel Quantitative Trait Loci Linked to Crown Rot Resistance in Spring Wheat |
title_fullStr | Identification of Novel Quantitative Trait Loci Linked to Crown Rot Resistance in Spring Wheat |
title_full_unstemmed | Identification of Novel Quantitative Trait Loci Linked to Crown Rot Resistance in Spring Wheat |
title_short | Identification of Novel Quantitative Trait Loci Linked to Crown Rot Resistance in Spring Wheat |
title_sort | identification of novel quantitative trait loci linked to crown rot resistance in spring wheat |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6165080/ https://www.ncbi.nlm.nih.gov/pubmed/30205560 http://dx.doi.org/10.3390/ijms19092666 |
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